Description
An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | libtar | <1.2.21 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 12 | libtar | 1.2.20-8+deb12u1 | — |
| Debian 11 | libtar | 1.2.20-8+deb12u1~deb11u1 | DLA-4033-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | libtar | 1.2.20-8.1ubuntu0.24.04.1 | USN-7398-1 |
| Ubuntu 22.04 LTS | libtar | 1.2.20-8ubuntu0.22.04.1 | USN-7398-1 |
| Ubuntu 20.04 LTS | libtar | 1.2.20-8ubuntu0.20.04.1 | USN-7398-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | libtar | 1.2.20-7ubuntu0.1~esm1 | USN-7398-1 |
| Ubuntu Pro 16.04 LTS | libtar | 1.2.20-4ubuntu0.1~esm1 | USN-7398-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | libtar | 1.2.20-17.el8 | RHSA-2023:2898 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | libtar | 1.2.20-17.el8 | ALSA-2023:2898 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | libtar | 1.2.20-17.el8 | RLSA-2023:2898 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libtar | 1.2.20-3.1 | openSUSE-SU-2026:11092-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libtar | 1.2.20-11 | — |
| Azure Linux 2 (CBL-Mariner) | libtar | 1.2.20-10 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | libtar | 1.2.20-17.el8 | ELSA-2023-2898 |
Advisories 8
- ALSA-2023:2898 Moderate: libtar security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2023-1238 Red Hat Enterprise Linux: Mehrere Schwachstellen in verschiedenen Komponenten BSI CERT-Bund (WID) · Jun 28, 2026
- RHSA-2023:2898 Red Hat Security Advisory: libtar security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-7398-1 libtar vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- openSUSE-SU-2026:11092-1 libtar-1.2.20-3.1 on GA media SUSE / openSUSE Security Updates · Jun 24, 2026
- DLA-4033-1 libtar - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2023:2898 Moderate: libtar security update Rocky Linux Security Advisories · Dec 27, 2025
- ELSA-2023-2898 Moderate: libtar security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 24, 2023
References
- https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807
- FEDORA-2022-fe1a4e3cf0 vendor-advisory
- FEDORA-2022-50e8a1b51d vendor-advisory
- FEDORA-2022-44a20bba43 vendor-advisory
- FEDORA-2022-88772d0a2d vendor-advisory
- FEDORA-2022-ccc68b06cc vendor-advisory